Stud-driver



F. A. BARNES AND E. G. HURVLBUT.

v STUD DRIVER.

APPLICATION FILED'APR.4,192|.

` Patented Nov. 1, 11921.

VENToRs. 7.-,vJ ga/f/zas entran s'r-Aras paraat eterea.

FRED A. BARNES AND EDWARD G. IIITBLIBU'I, OF INDIANAPOLIS, INDIANA.

STUD-DRIVER.

I Application lcd April 4,

To all whom it may concer/a.'

Be it known that we, FnnD A. BARNES and EDWARD G. I-IURLBUT, citizens of the United States, and residents of the city of Indianapolis, county of Marion and State of Indiana, have invented certain new and useful Improvements in Stud-Drivers, of which the following is a specification.

Our invention relates to stud and screw drivers in general and more particularly to that ltype of driver which engages one end of a threaded stud to drive or screw the other end of the stud into proper engagement with a threaded or tapped hole. A principal object of the invention is to provide a stud driver which will positively and rigidly engage a threaded end of the stud and which may be quickly and easily released from said engagement. A further object is to provide a driver that may be readily adapted to drive studs of various diameters and to readily release said driver from said studs when desired. A further object is to provide a stud driver in which the locking element is positive inaction, is iixedly secured to the driver, is spring retained in operative position at all times, and which will release the stud by a single short motion. A further object is to provide a stud driver having a plurality of interchangeable sleeves or collets to receive studs of various sizes or threads, while a iinal object is to produce a device which is exceedingly simple, durable, practical and inexpensive of manufacture and upkeep.

With these and other objects in view, our invention will be more clearly understood by reference to the accompanying drawings' which illustrate a preferred form of the de'- vice, it being understood that such modifications thereof may be utilized as come legitiI mately within the scope of the appended claims. With more particular reference to the drawings,l in which like numerals refer to like parts throughout, Figure 1 is a plan view of the assembled driver, Fig. 2 being a vertical section on line 2 2 of Fig. 1. Fig. 3` is an exterior elevation of the device, Fig. 4 being a vertical elevation of one of the sleeves or collets, and Fig. 5 is a plan view of this collet. Y

In the drawings, the numeral 6 indicates the driver body, preferably hexagonal in form, which is bored to relatively large diimeter for the greater portion of its length as at 7, the remaining length being bored Specication of LettersPatent.

1921. Serial No. 458,620.

to a smaller diameter as at 8, providing anv annular shoulder 9 within the body 6. The bodyis extended upward, as at 10,to receive an externally 4applied spanner wrench or other'driving member 11 having a suitable handle 12 or other turning means.

or drive the threads 19 securely into the" threaded hole in` casting 20. A locking element or key 21, having one edge tapered or beveled as vat A22, is inserted transversely through openings 23 in body' 6, this 'key passing through the slot 14 in collet 13 within the bore 7, and engaging shoulder 15 of said collet. A helical spring 27, pref erably conical in form, surrounds the pro` jecting end 24 of key 21 and is secured thereon as by a pin 25 and a washer 26, the opposite end of the spring resting on one of the flat faces 28 of body 6.

In practice, the desired collet 13 is placed within the bore 7 and the key 21 is inserted to position and is secured there by the spring 27 and pin 25. Stud 18 is screwed into the threaded bore 16 of collet 13 until it engages the key 21. The socket wrench 11 is then slipped on the end 10 of body 6 and by turning on the handle 12 the thread 19i may be driven tightly into the threaded casting 20. In doing this the stud will have become tightly locked or jammed against the key 21, but a slight pressure or blow upon end 24 of the key will cause a compression of spring 27, a retractive movement of key 21 and an instantaneous release of the pressure or jam, when the driver may be quickly and easily screwed ofi' the stud 18 without danger of loosening or disturbing its attachment to casting 20. As soon as the driver is backed off, spring 27 again draws key 21 to its operative position.

Having thus described our invention, what we claim as new and desire to protect by these Letters Patent is 1. A stud driver comprising a body portion, a bore and a counter-bore within said body portion, said counterbore entering said body portion atits opposite end from said Patented Nev. 1,1921.

bore, a plurality of interchangeable collets to lit Within said counterbore, said collets being Wholly Within said counterbore, a key transversely positioned through said body portion, means for retaining said key in adjusted position, and an operating handle removably engaging the counterbored end of said body portion.

2. In a stud driver, a body portion, alongitudinal counterbore within said body portion, a key transversely positioned through said body portion and through said counterbore, a stud collet removably positioned Within said counterbore, a transverse slot through said collet to receive said key, a seat in said transverse slot to engage said key, and spring actuated means to retain said key to maintain said key in operative position in said body portion.

' 3. In a stud driver, a body portion having a longitudinal counterbore, an annular shoulder Within said counterbore, a plurality of interchangeable collets operatively engaging said annular shoulder, a transverse slot in said collets in alinement with a transverse slot through said body portion, a key through said transverse slots, a tapering face on said key, a helical spring surrounding a projecting portion of said key, and a Washer and pin to retain said spring upon said key, substantially as described.

4. A stud driver vcomprising the combination of a body portion, a longitudinal counterbore Within said body portion, an annular shoulder Within said counterbore, inter.

collets, a tapering key passing through said slots in said body'portion and said collet, a helical spring engagingl a Washer upon a projecting portion of said key to maintain said key normally'in operative position in said slots, rand to vrelease ysaid key from said normally operative position When said spring is compressed, as and for the purpose described.

In testimony Whereoi:I We have hereunto set our hands in the presence of two subscribing Witnesses.

i FRED A. BARNES,

Y EDWARD Gr. HURLBUT. `Witnesses: i

VILLIAM J. Groom', JENNIE C. BARNES. 

